WhatSize 6.6.3 | Mac OS X | 12 MB.
Displays at a glance the size of your files and folders.
With WhatSize in the blink of an eye you will see what is the size of each of your folders with your files on your Mac, simply navigate between them as if it were the Finder. While it is true that the Finder displays the size, it does for all or for folders, or you have to select them to know.
WhatSize is more comfortable because next to each folder and file size puts us: in red the most consistent in the medium size mauve and finally green lighter and lighter.
From the side of WhatSize, you can add new directories whose size you want to monitor. In the other area of WhatSize, selecting a file, you can send it to Trash from the context menu or see the full path and display it in the Finder. Finally, WhatSize has several views, Finder type and filters of various sizes.